The Abbey of Monte Cassino (today usually spelled Montecassino) is a Benedictine monastery on a rocky hill about 130 kilometres (80 mi) southeast of Rome, in the Latin Valley. Located on the site of the ancient Roman town of Casinum, it is the first house of the Benedictine Order, having been established by Benedict of Nursia himself around 529. It was for the community of Monte Cassino that the Rule of Saint Benedict was composed.
The first monastery on Monte Cassino was sacked by the invading Lombards around 570 and abandoned. Of the first monastery almost nothing is known. The second monastery was established by Petronax of Brescia around 718, at the suggestion of Pope Gregory II and with the support of the Lombard Duke Romuald II of Benevento. It was directly subject to the pope and many monasteries in Italy were under its authority. In 883, the monastery was sacked by Saracens and abandoned again. The community of monks resided first at Teano and then from 914 at Capua before the monastery was rebuilt in 949. During the period of exile, the Cluniac Reforms were introduced into the community.
